Image forming apparatus

摘要

Based on a photosensitive drum life threshold value when each of the plurality of image formation execution modes is independently used, and a photosensitive drum life threshold value according to a usage rate of each of the image formation execution modes, the image forming apparatus having a plurality of image formation execution modes calculates a photosensitive drum life threshold value according to the usage rate. Then, the image forming apparatus compares the calculated photosensitive drum life threshold value with a remaining CT film thickness prediction value for the photosensitive drum to determine the life of the photosensitive drum.

主权项

1. An image forming apparatus comprising:
a rotatable image bearing member; a charging unit configured to charge a surface of the image bearing member; an electrostatic latent image forming unit configured to perform exposure of a charged surface of the image bearing member to form an electrostatic latent image on the image bearing member; a developing unit configured to develop the electrostatic latent image into a visible image by using a developer bearing member; and a cleaning unit disposed in contact with the image bearing member, and configured to clean the developer remaining on the surface of the image bearing member, wherein the image forming apparatus has first and second image formation execution modes, wherein the first mode is performed by contacting the image bearing member and the developer bearing member and the second mode is performed by not contacting the image bearing member and the developer bearing member, and wherein the image forming apparatus uses a variable threshold, for notifying the life of the image bearing member, the variable threshold being based on (i) life thresholds of the image bearing member for the first and second modes and (ii) a usage rate of the first and second modes.